/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.hive.hcatalog.data.transfer;
import java.io.Externalizable;
/**
* This read context is obtained by the master node and should be distributed
* to the slaves. The contents of the class are opaque to the client. This
* interface extends {@link java.io.Externalizable} so that implementing
* classes can be serialized using standard Java mechanisms.
*/
public interface ReaderContext extends Externalizable {
/**
* Determine the number of splits available in this {@link ReaderContext}.
* The client is not required to have this many slave nodes,
* as one slave can be used to read multiple splits.
* @return number of splits
*/
public int numSplits();
}